Patents by Inventor Satyam Dwivedi

Satyam Dwivedi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220196780
    Abstract: Some embodiments advantageously provide methods, wireless devices and network nodes for adapting PRS transmission to hide the local clock information of base stations. According to one aspect, an exemplary process includes a network node for transmitting PRS. The process includes delaying or advancing the transmission of at least one positioning reference signal in accordance with received offset information wherein delaying or advancing the transmission according to the offset information shifts the transmission of the at least one positioning reference signal away from a scheduled transmission time for the one positioning reference signal transmission.
    Type: Application
    Filed: August 17, 2018
    Publication date: June 23, 2022
    Inventors: Satyam DWIVEDI, Henrik RYDÉN, Sara MODARRES RAZAVI, Fredrik GUNNARSSON
  • Publication number: 20220167293
    Abstract: In one aspect, a method for detecting changes in distance between a first wireless device and a second wireless device is provided. The method comprises determining a variation of a parameter over time, based on measurements of first timing signals transmitted between the first and second wireless devices. The variation of the parameter depends on a distance between the wireless devices, and comprises periodic step transitions as a result of relative clock drift between the wireless devices. The method further comprises predicting a time at which a periodic step transition is expected to occur based on the variation of the parameter, and determining a value of the parameter based on measurements of second timing signals. In response to a determination that the determined value of the parameter differs from an expected value of the parameter, it is determined that the distance between the wireless devices has changed.
    Type: Application
    Filed: February 21, 2019
    Publication date: May 26, 2022
    Inventors: Dennis Sundman, Satyam Dwivedi, Miguel Lopez
  • Patent number: 11329746
    Abstract: A method and a first device (110A) for synchronizing a first clock in the first device (110A) with a second clock in a second device (110B). The first device (110A) estimates 5 (A430) a relative clock phase offset, based on a sequence of round trip times, RTTs, of precision time protocol, PTP, messages which are exchanged between the first and second devices (110A, 110B). The estimated relative clock phase offset is a time difference between a time of arrival of a first arrived PTP message among the PTP messages and a direct subsequent clock cycle. The first device (110A) further determines 10 (A450) a clock value of the first clock, based on the estimated relative clock phase offset, to synchronize the first clock with the second clock.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: May 10, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Satyam Dwivedi, Fredrik Gunnarsson, Bo Hagerman, Avneesh Vyas
  • Publication number: 20220123886
    Abstract: A method performed by a user equipment, UE (110, 200) includes obtaining (1202) a Sounding Reference Signal, SRS, configuration from a network node (160) and determining (1204) an SRS waveform and transmitting (1206) the SRS waveform. The SRS waveform is adapted for positioning based on the SRS configuration to have a full bandwidth within a bandwidth applicable for the SRS waveform.
    Type: Application
    Filed: January 13, 2020
    Publication date: April 21, 2022
    Inventors: Florent Munier, Per Ernström, Erik Stare, Fredrik Gunnarsson, Johannes Nygren, Satyam Dwivedi, Ritesh Shreevastav, lana Siomina
  • Publication number: 20220095261
    Abstract: A method and network node for uplink coordinated multipoint positioning are disclosed. According to one aspect, a method includes employing a coordinated multipoint function to decode data from a WD using signals received from the WD by the network node and from signals received from the WD by a plurality of cooperating network nodes. The method further includes converting the decoded WD data signal into a time domain reference signal and convert the signals received from the plurality of cooperating network nodes into time domain neighbour signals. The method also includes cross-correlating the time domain reference signal with the time domain neighbour signals to determine a time difference of arrival for each of the plurality of time domain neighbour signals. The method also includes calculating a position of the WD based on the time differences of arrival and based on locations of the cooperating network nodes.
    Type: Application
    Filed: December 13, 2019
    Publication date: March 24, 2022
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Roland SMITH, Miguel BERG, Satyam DWIVEDI, Mike SKOF
  • Publication number: 20220086787
    Abstract: A method, system and apparatus are disclosed. In one or more embodiments, a method in a wireless device is provided. The wireless device is configured to communicate with a network node. The wireless device receives an extended signal transmitted by the network node. The extended signal includes a base signal and at least one additional signal. The wireless device estimates a time of arrival, TOA, based on the extended signal.
    Type: Application
    Filed: January 12, 2020
    Publication date: March 17, 2022
    Inventors: Per ERNSTRÖM, Erik STARE, Fredrik GUNNARSSON, Florent MUNIER, Johannes NYGREN, Satyam DWIVEDI, Iana SIOMINA, Deep SHRESTHA
  • Patent number: 11277425
    Abstract: Methods, systems, and computer program products for anomaly and mode inference from time series data are provided herein. A computer-implemented method includes receiving time-series sensor data for each one of a group of devices; extracting a set of states for each device in the group from the time-series sensor data; constructing a state-transition graph for each of the devices, wherein each of the state-transition graphs comprises nodes corresponding to each state in the set and edges corresponding to a probability of transition between the extracted states over time; identifying, for each set, a given state as one of: a mode, a normal state and an anomalous state based on the state-transition graph; and detecting one or more anomalous devices in the group by computing similarities between different devices in the group, based at least in part on the determined state-transition graphs.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: March 15, 2022
    Assignee: International Business Machines Corporation
    Inventors: Kedar Kulkarni, Padmanabha V. Seshadri, Satyam Dwivedi, Amith Singhee, Pankaj S. Dayama, Nitin Singh
  • Patent number: 11269851
    Abstract: In an approach for an indoor survey data collection, a processor generates reference points based on a site map and an accuracy requirement. A processor collects data at each reference point through a data collecting agent. A processor detects an outlier at the reference points using a feedback from the data collecting agent during the data collection and a database. A processor eliminates the detected outlier and rectifies the data.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: March 8, 2022
    Assignee: International Business Machines Corporation
    Inventors: Surya Shravan Kumar Sajja, Ashok Pon Kumar Sree Prakash, Amith Singhee, Satyam Dwivedi
  • Patent number: 11271957
    Abstract: Methods, systems, and computer program products for contextual anomaly detection across assets are provided herein. A method includes obtaining time-series data frames corresponding to assets; clustering the assets into one or more cohorts based on the time-series data frames, each cohort comprising assets having statistically similar time-series data frames; for each given asset within each cohort: applying a time-context window to the portion of the time-series data frames corresponding to the given asset to generate at least one transformed data frame, and determining an asset distribution for the given asset based on the at least one transformed data frame; determining one or more of that at least one of the assets within at least one of the cohorts is anomalous and that at least one of the cohorts is anomalous; and causing at least one remediation action to be performed based on the determining.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: March 8, 2022
    Assignee: International Business Machines Corporation
    Inventors: Kedar Kulkarni, Padmanabha Venkatagiri Seshadri, Sumanta Mukherjee, Satyam Dwivedi
  • Publication number: 20220039042
    Abstract: Methods and apparatuses for determining asynchronization between a first clock used by a first node (N1) and a second clock used by a second node (N2). A sequence of time differences is measured based on a sequence of signals periodically sent by the second node (N2) and received by the first node (N1), wherein each time difference of a signal is between a respective transmission timestamp in accordance with the second clock and a respective receiving timestamp in accordance with the first clock; and at least one of a relative phase offset or a relative frequency offset between the first and the second clock is estimated based on the sequence of time differences.
    Type: Application
    Filed: September 27, 2018
    Publication date: February 3, 2022
    Inventors: Satyam DWIVEDI, Fredrik GUNNARSSON, Avneesh VYAS, Magnus SANDGREN
  • Publication number: 20220038232
    Abstract: A method, network node and wireless device for position reference signal (PRS) design by extending a base signal are disclosed. According to one aspect, a method in a wireless device (WD) includes obtaining extended reference signal, RS, configurations from the network node. The method also includes determining a waveform associated with the extended RS. The method also includes detecting a RS and estimate an associated time of arrival. The method further includes sending a measurement report to the network node based on the estimated time of arrival.
    Type: Application
    Filed: September 27, 2019
    Publication date: February 3, 2022
    Inventors: Per ERNSTRÖM, Ritesh SHREEVASTAV, Johannes NYGREN, Deep SHRESTHA, Erik STARE, Florent MUNIER, Satyam DWIVEDI, Sara MODARRES RAZAVI, Fredrik GUNNARSSON
  • Publication number: 20220011394
    Abstract: A method and network node for differential matched summed antenna positioning are disclosed. According to one aspect, a method includes summing sequential uplink data signals at each of a plurality of antennas of the network node to produce a plurality of antenna signal sums. The method also includes selecting one of the antenna signal sums to be used as a reference antenna signal sum. A channel impulse response is determined for each of a plurality of other antennas by cross correlating the reference antenna signal sum with the others of the plurality of antenna signal sums. The method further includes estimating a time difference of arrival from the channel impulse responses of the plurality of antennas, and estimating an error of the estimated time difference of arrival of each antenna. A position of a wireless device is determined using the estimated time differences of arrival.
    Type: Application
    Filed: December 13, 2019
    Publication date: January 13, 2022
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Roland SMITH, Miguel BERG, Satyam DWIVEDI, Mike SKOF
  • Publication number: 20220006589
    Abstract: A system and method for providing phase noise-based signal design for positioning in a communication system. In one embodiment, an apparatus is configured to receive configuration parameters for a reference signal based on a level of phase noise for the reference signal estimated by a user equipment, apply the configuration parameters to the reference signal to obtain a modified reference signal, and transmit the modified reference signal to the user equipment to enable a position of the user equipment to be determined.
    Type: Application
    Filed: November 7, 2019
    Publication date: January 6, 2022
    Inventors: Satyam DWIVEDI, Ali ZAIDI, Dehan LUAN
  • Publication number: 20220004894
    Abstract: A method for managing the composition and presentation sequencing of compound visual elements, the method including generating a graph of all possible compound visual element combinations, generating a set of possible visual element presentation sequences according to a depth-first search (DFS) of the graph, generating a score for each member of the set of possible visual element presentation sequences according to visual element attributes, and enumerating a visual element presentation sequence according to a visual element presentation sequence score.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 6, 2022
    Inventors: Padmanabha Venkatagiri Seshadri, Nupur Aggarwal, Sumanta Mukherjee, Satyam Dwivedi
  • Publication number: 20210365498
    Abstract: One embodiment provides a method, including: receiving a multi-variate time-series dataset comprising a plurality of time-dependent datasets; for each of the plurality of time-dependent datasets, segmenting each of the plurality of time-dependent datasets at a transition point; clustering segments of the plurality of time-dependent datasets into clusters having similar lengths of segments; for each cluster (i) selecting a representative segment length and (ii) identifying a feature subset in that cluster; identifying, across the feature subsets, subset transition points, wherein each of the subset transition points corresponds to a change in value that meets a predetermined threshold within its corresponding feature subset; and determining, by applying a threshold test to the subset transition points, a segment length to be used in segmenting the entire multi-variate time-series dataset.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 25, 2021
    Inventors: Kedar Kulkarni, Padmanabha Venkatagiri Seshadri, Satyam Dwivedi
  • Patent number: 11182400
    Abstract: Methods, systems, and computer program products for anomaly comparison across multiple assets and time-scales are provided herein. A computer-implemented method includes obtaining time-series data for each one of a plurality of assets; determining, for each of a plurality of time scales, one or more segments of the time-series data for each one of the plurality of assets; generating a graph for each one of the time-scales, the graph representing similarities between the one or more segments of the plurality of assets for the respective time-scale; computing an isolation metric for each of the generated graphs for at least one of the plurality of assets; aggregating the computed isolation metrics for the at least one asset; and determining whether the at least one asset is anomalous, based at least in part on a comparison of the aggregated isolation metric to a threshold.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: November 23, 2021
    Assignee: International Business Machines Corporation
    Inventors: Kedar Kulkarni, Padmanabha V. Seshadri, Satyam Dwivedi
  • Publication number: 20210341562
    Abstract: Methods and apparatuses are disclosed for beam based positioning measurements and measurement reporting. In one embodiment, a method in a network node includes communicating information to configure a wireless device (WD) with a plurality of positioning reference signals, the communicated information at least indicating which of the plurality of positioning reference signals are transmitted from the same transmission point. In another embodiment, a method in a WD includes receiving information indicating which of a plurality of positioning reference signals are transmitted from the same transmission point, and performing measurements on each of the plurality of positioning reference signals transmitted from the same transmission point.
    Type: Application
    Filed: October 4, 2019
    Publication date: November 4, 2021
    Inventors: Per ERNSTRÖM, Fredrik GUNNARSSON, Nicklas JOHANSSON, Sara MODARRES RAZAVI, Satyam DWIVEDI, Ritesh SHREEVASTAV, Deep SHRESTHA
  • Publication number: 20210312532
    Abstract: One embodiment provides a method, including: accessing, at an information handling device, a dynamic visual media corpus, wherein the dynamic visual media corpus comprises a plurality of dynamic visual media scripts; segmenting each of the plurality of dynamic visual media scripts into scenes; generating, for each of the plurality of dynamic visual media scripts, a character fingerprint identifying topics corresponding to each character within a corresponding dynamic visual media script, wherein the generating comprises (i) extracting both characters and topics from the dynamic visual media script and (ii) associating each of the topics with a corresponding character, wherein the character fingerprint identifies costumes of a given character and a topic corresponding to each costume; and producing, for each scene within each dynamic visual media script, a scene vector identifying (iii) the topics included within a corresponding scene and (iv) a character fingerprint for each character occurring within the sce
    Type: Application
    Filed: April 7, 2020
    Publication date: October 7, 2021
    Inventors: Nupur Aggarwal, Sumanta Mukherjee, Padmanabha Venkatagiri Seshadri, Abhishek Bansal, Satyam Dwivedi
  • Publication number: 20210297216
    Abstract: A method for positioning reference signal configuration comprises receiving, from a network node, one or more first positioning reference signals in a first PRS configuration; performing one or more first measurements on the first PRS to determine one or more first characteristics of the one or more first PRSs; sending, to the network node, a second PRS configuration determined based on the one or more first characteristics; receiving, from the network node, a third PRS configuration, wherein the third PRS configuration comprises one or more third PRSs having at least one different signal characteristic than the one or more first characteristics of the first PRS; and performing one or more second measurements on the one or more third PRSs. The method provides a dynamic configuration for PRS based on the feedback from the UE and a location node, beamforming configuration, or any requirements for physical layer efficiently.
    Type: Application
    Filed: August 2, 2019
    Publication date: September 23, 2021
    Inventors: Ritesh SHREEVASTAV, Åke BUSIN, Sara MODARRES RAZAVI, Iana SIOMINA, Satyam DWIVEDI, Fredrik GUNNARSSON, Deep SHRESTHA
  • Publication number: 20210112521
    Abstract: Methods and apparatuses for determining a position of a wireless device in a wireless communication network are provided. The method includes obtaining a first sequence of Time Difference of Arrivals (TDOAs) at the wireless device of reference signals, which are transmitted by and used for synchronization of a first pair of network nodes; and determining, based on the first sequence of TDOAs, a first relative distance. The method also includes obtaining a second sequence of TDOAs at the wireless device of reference signals, which are transmitted by and used for synchronization of a second pair of network nodes; and determining, based on the first sequence of TDOAs, a second relative distance. The method further includes determining the position of the wireless device based on the first and second relative distances. Corresponding computer programs and computer program carriers are also disclosed.
    Type: Application
    Filed: February 9, 2018
    Publication date: April 15, 2021
    Inventors: Satyam DWIVEDI, Henrik ASPLUND, Jonas MEDBO, Fredrik GUNNARSSON, Ali ZAIDI, Sara MODARRES RAZAVI